Finally got around to watching the trailer. It "almost" makes me regret not getting a PS3 again. It's interesting but honestly I'll just watch Youtube for the highlights. After 3 games Disgaea's going to have to do something really major to impress me. That and now that I'm no longer in school I really don't have the endless hours required to grind on such a game for all the story tidbits. Honestly I wish they'd focus on the classes then on the combat gimmicks like Magi-Change (or whatever the proper name is for turning monsters into weapons) or tower acrobatics. It feels like they're focusing more on the things you'll never really "need" to use in the game and ignoring the core elements over the past 3 installments. (I've never had to do anything more complicated than basic tossing to progress in the games.)
Something like "Two New and Unique Human Classes!" would interest me far more than "We made our monster (weapons) grow! And you can hold two of them!".